Typewriting machine



May 1, 1923;

F. H. ARMSTRONG TYPEWRITING' MACHINE 5 Sheets-Sheet 1 Filed Nov. 9

I I 30 3a 29 MVENTOR QMMM A'TToRNEYs May 1, 1923. 4,453,579

F. H. ARMSTRONG TYPEWRITING MACHINE Filed Nov'. 9, 1918 5 Sheets -SheetM BY M 179W ATTORNEYS May 1, 1923. 1,453,579 7 i F. H. ARMSTRONGTYPEWRITING MACHINE Filed Nov, 9, 1918 5 Sheets-Sheet 5 INVENTOR MKW M7.29am) ATTORNEYS Patented May 1, 1923.

UNITED sr FRANK H. ARMSTRONG, AUBURN, 'NEW YORK, ASSIGNOR TO CORONATYPEWRITER,

COMPANY, INC., OF GROTON, NEW YORK, A CORPORATION OF NEW YORK.

'rYPEwRIrING MACHINE.

Application filed November 9, 1918. Serial No. 261,851.

T all whom it may concern:

die it known that I, FRANK H. ARM- s'rnoxu, a citizen of the UnitedStates of America, and a resident of Auburn, county of Cayuga, Statev ofNew York, have invented certain new and useful Improvements inTypewriting Machines, of which 'the following is a full and clearspecification.

This invention has-relation to that type of paper-feeding devicescovered in my copending application Serial No. 256,195, filed September30, 1918, and the object of the present improvements is to provide asimple 1 and easily-manufactured mechamsm for normally pressing the twopaper-feedframes toward the platen, as more \fully hereinafter setforth. In the drawings'-- Fig. 1 is a perspective view of aplatencarri'age, the platen-roller and one endflange being broken away;

Fig. 2 is a longitudinal sectional view taken through one end of thecarriage; Fig. 3 is a plan view'of Fig. 2, the platenroller beingomitted, and part of the rockshaft being broken away;

Figs. 4, 5 and .6 are detail vertical sec tionai views showing themanner of pivotall ,"s1ipporting the transverse rock-bar;

- Figs. 7, 8 and 9 are detail views hereinafter described;

Figs. 10, 11, 12 and 13 are vertical sectional views showing thedifferent positlons of the paper-feed mechanism; and

Figs. 14 and 15 are inafter described.

Referring to the drawings annexed by reference characters, 15 designatesthe p atencarriage provided at each end with an upstanding flange 16 inwhlch the ends of the shaft 17 of theplaten 17 are journaled i the usualmanner. Y

Extending between the end-flanges 16a the full length of the carriage,is a sheet-metal bar 18 which constitutes a rock-shaft vby reason of thefact that each of its extreme ends is bent downwardly to form an ear 19,

which ear is pivotally supported on a screw-.

pivot 20' threaded from the outside inwardly through the end-flange 16,the bar being rockable upon these pivots 20. ThlS bar is located behindthe platen and at a point about on a horizontal level with the views ofdetails hereunder face of the platen. The rear edge of the bar isbentdownwardly to form a longitudinal flange 21 to stiffen the rock-bar,and the front edge of this rock-bar is provided with fourforwardly-extending lever-fingers 22, each of which at its extremeforward end is bent downwardly and then upwardly to form a hook 23 whichis open at its upper side. This rockable plate-like shaft 18 may bemanually rocked by means of a cam-lever 24 pivotally mounted onplaten-shaft 17' close to the inner face of one of the endfianges 16 ofthe carriage, the cam part of this lever being provided with two workingfaces 25 and 26, adapted to alternately c0- operate with the upper edgeof an arm 27 formed integralwith the rock-bar 18 and 'bent to fitvflatwise against the adjacent end 16 of the carriage so that its freeforward end will lie directly under the two working faces of thecam 24,said arm 27 being normally held up against one or the other of saidworking-faces 24 and 25 by a retractile spring 28. When the arm 27 liesagainst the cam-face 25, the rockable bar 18 will be in its normalposition, i. e., with its upper face horizontal, and the feed-rolls,

as hereinafter described, will be in their normal position against theplaten or the work-sheet thereon; but when the cam-lever 24 is turned toswing down the forward end of the arm 27 and thus ,bring the othercamface 26 intolocking relation with the upper edge of the arm 27, therockable bar '18 will have its forward edge tilted downwardly I andthus, in the manner hereinafter set forth, cause the feed-rolls to beretracted from working position.

The feed-rolls 29 are arranged in two sets, one at each side of themid-length of the platen. Each set consists of a front-shaft 30 and acorresponding rear-shaft 31, each shaft carrying one or more of the feedrolls 29, two being shown on each'shaft in the present structure, aloose. spacing-sleeve 32 being arranged between each pair to space themapart. Each of the front-shafts 30 is journaled loosely in upstandingears 33 formed integral on the forward ends of a pair of flat bars 34,and each of the rearshafts 31 has each of its ends journaled in a pairof upstanding ears 35 formed inte-- grally with the rear end of each ofthe bars 34, so that each set of rolls forms a substana pair of the 23bear downwardly upon the rear ends ofthe bars 34 and thus tilt said barsdownwardl In its preferred form, which is that illustrated, 1 arrangethe bent ends of the fingers 22 So that each will lie between ears 35 insuch position that the shaft 31 will extend through the hooklike part 23of the finger, the purpose in turning up the extreme end of the fingerto form said hook being to engage'the front face of the shaft 31and'thus assist in holding the parts intheir assembled relation.

To assist in-holding the shafts 31 against undue endwise movement intheir supporting ears 35, I provide the bar 18 with forwardly-extendingfingers 36 which are bent downwardly at their forward ends to lie inaxial alinement with said shafts, a slight distance from the ends ofsaid shafts. In the present construction, these shafts 31 need only bejournaled loosely in the ears so that they will naturally have a slightendwise movement in these ears;it is for this reason that I provide saidstop-lugs 36. In this way, I avoid the necessity of providing the shafts'31 with stop-collars adapted to abut against the ears 35. For the samerea- Gil . upon u on the upper son, I provide each of the forward endsof the bars 34 with an upstanding stop-lug 37 in position to restrictthe endwise movement of the front-shafts 30. The foregoing parts areconstructed and arranged substantially as in my aforesaid copendingapplication.

Each of the rectangular frames, of which parts 34 form the end bars, issupported the flat outer ends of sheet-metal arms 38, these arms beingformed integral with and extending inopposite directions at right bars39 pivotally mounted face of the platen-carriage, t ese two bars 39extending transversely of the carriage and lying parallel with eachother. The front ends of the bars-39 are provided withforwardly-projecting integral pivots 40 which work in cats 41 struck upfrom the bottom-plate ofthe platen-carriage; and the rear end of eachbar 39 is pivotally connected to the platen-carriage by a lug 42 stam edup from the platen-car riage plate ant including upwardly and laterallytherefrom to form an open crotch. These two lugs 42 extend in oppositedirections, that is, toward the respective ends of the platen-carriage,and the rear ends of the bars 39 are normally held in the crotche:formed by these lugs by means of a coilspring 43. whereby it will beunnecessary to employ closed pivot-holding ears at these rear ends ofthe bars 39, thereby contributangles to fiat ing not only to cheapnessof manufacture but also to ease of assembling the parts.

The spring 43 is connected to the bars 39 by means of upstanding rockarms 44 provided with notches in their vertical edges to receive thehooked ends bf the spring, these notches being duplicated along the saidvertical edges to enable the spring to be adjusted bodily inwardly andoutwardly on these arms tothereby vary the tension of the spring. Theupstanding rock arms 44 are connected to the bars 39 at a distance fromtheir pivotal-points in the'lugs 42, this offsetting of the arms 34being obtained by mounting the same on the outer ends oflaterally-extending arms 45 formed integral with the rear ends of bars39. To prevent undue endwise JllOVGlIlQllt of the bars 39 rearwardly,each bar is provided along its inner edge with a stop-lu '46 which isadapted to abut against the front edge of the adjacent pivot lug 42. Itwill be observed shaft 18 is ro'cked to a position in which its I upperface is in horizontal position, the fingers 22 will be in their raisedposition and the two roller-sets will be free to be pressed up againstthe platen through the medium of the arms 38 and their spring-actuatedconnections; and that when said bar 18 is rocked by swinging arm '27downward in the manner heretofore described the downwardly-bent. ends ofthe fingers 22 willstrike against the rear end of all the bars 34 andfirst swing them downward about the front feed-roll-shaft far enough toretract the rear feed-rolls 29 but still leave th. front feed-rolls inworking position.

further depression of the fingers 22 will swing the. bars 34 clownwardlyabout the axis of rock-shaft 18 (and thus bring about a correspondingdepression of the forward ends of the bars 34) by the following means:

Several (preferably 4) of the ears 35 are each extended upwardly andrearwardly to a point above the upper flat surface of the rock-bar 18.thus forming hook-like roe-k arms 45. The initial rocking of the rockbar18 and the bars 34 brings the rear extremities of the arms 45 intocontact with said rock-bar 18 so that after the rear feedrolls have beenretracted from the platen these arms 45 interlock with the rock-hai- 18in the manner of a knuckle-joint and thereby cause the further rockingof the rock-bar 18 to swing the bars 34 with the rock-bar. as shown inFig. 13. in which posit1on both springs 43 are extended to maximum andthe angular rocking members 38,

. ing provided with a I pendent movement of the bodily up and down,

-bers to restore all the hereinbefore described; and when the bandle-endof the cam-lever is moved rearwardly, as shown in full lines in Fig. 14,to bring the other cam-face 25 into action, the spring 28 will draw therock-bar 18 to normal position and thus ermit the springs 43 and thepairs of angu arrocking meming position. The bars 34 have loose rockarms38 and the angugradually del'ar supporting members are pressed by saidbars to positions flat upon,

the base of the carriage as-the shaft 18'is rocked in a direction tocast-off the feed rolls.

It will be observed that the outer extremities of the arms 38 arebentdown-. wardly at 38' to pass under the bars 34; and that at pointscoincident with'these' bentdown ends the platen-carriage is provided'with holes 51 to permit these bent ends to pass down through thetop-plate of the platen-carriage when the bars 38 are depressed to theirlowermost position; in this way, compactness in my device is furtherprovided for.

The sheet-metal prox'ided at its forward ed mg ears 53,which are rigidlyfastened to the rear face of the scale-bar 54-. The paper-guide isprovided at intervals with paper-guide pan 52 is ongltudinal slots 55through which the feed rolls extend. and, for the purpose of ensuring apositive movement up and down of the guide in unison with thefeed-rolls, I provide the guide at each end with a depending car 56 forengagement with the ad Jacent front feed-roll shaft .30, said ear beholethrough which the shaft extends.

The pivotal connection of the roll frames with the rock shaft 18 and thevertical play of the rear. feed-roll shafts permitted by the spacebetween the shafts and the bottoms of hooks 23 and the space between thebottoms of hooks 23, and bars 334. permit indefeed-roll frames and alsopermit either the front or rear edge of either of the frames to swingaway from the platen. while the rock shaft is in normal position, asmore fully set forth in my application before referredto. As either ofthe angular supporting members may swing independently of its com anionmember. it will be obvious that eit' er end of either frame may swingaway from the platen.

The nature and scope of the invention having been thus indicated and itspreferred embodiment having been specifically described, what is claimedas new is:

feed-rolls to work-' ge with depend-'- \l v .1. In a-typewritingmachine, the combination of 'a platen carriage. a platen rotatablymounted on the carriage, a feed-roll frame. tandem feed-rolls mounted inthe frame, and

a pair of springurged niem'bers engaging opposite ends of the frame andplvotally mounted on the platen, carriage to swing about axes extendingtransversely of Y the platen. i v 2. In a typewriting machine thecombination of a platen carriage. a platen rotatably mounted on thecarri age,'a feed-roll frame. tandem feed-rolls mounted in the frame;means for positively Y shifting the frame away from the platen tocast-off the feedrolls. a pair of rocking-members mounted on thecarriage and engaging the frame adjacent opposite ends of the frame. anda single spring for rocking both of said'members toward the platen.

3. In a typewriting machine, thecombination of a platen carriage, aplaten rotatablv mounted tandem feed-rolls .mounted in the frame, and apair of spring-urged members mounted on the platen carriage to swingabout axes extending transversely of the platen and engaging the frameadjacent opposite ends of tandem feed-rolls.

.tion of a platen carriage, a platen rotatably mounted-on the carriage.a floating feedroll frame, tandem feed-rolls mounted in said frame, a'pair of members mounted on the platen carriageto swing about axesextendmg transversely of the platen and exertingpress'ure on said frameat two longitudinally spaced points intermediate the tandem feed-rolls,and a single spring-for normally swinging both ofsaid members toward theplaten.

5. In a tvpewriting machine the combination of a p aten carriage, aplaten rotatably mounted on the carriage; a feed-roll frame. tandemfeed-rolls mounted in said frame. cast-off mechanism for shifting saidframe toward and from the platen, connections between the cast-offmechanism and the frame for permitting a limited movement of eitheror'both longitudinal edges ofthe frame toward and from theplaten'independently of on the carriage,.a feed-roll frame,

the castofl mechanism and restraining sidewise and endwise movements ofthe frame, a pair of pressure mounted on the carriagelto swing aboutaxes extendin transverselyof the platen and engaging t e frame ad acentopposite ,end's of the frame at points intermediate the tandemfeed-rolls. and a single spring for forcing said members toward theplaten with anniform pressure.

6. In a typewriting machine, the combine a platen .rotatably g tion of aplaten carriage,

mounted on the carriag a feed -rollfram members pi votally.

cach provided with an arm extending tandem feed-rolls mounted in theframe, a pair of members extending transversely of the carriage andpivotally connected adjacent their opposite ends to the carriage andlongitudinally of the carriage under the feedroll frame. said armsextending in opposite directions and engaging the frame adjacentopposite ends of the frame, and'a spring connected with said members tocause said arms to exertu'niform pressure on the frame.

7. In a typewriting machine, the combination of a platen carriage, aplaten rotatably mounted on the carriage, a pair of feed-roll framesarranged end to end, tandem feedrolls mounted in each frame, cast-offmechanism for simultaneously shifting both frames awa v from the platen,two pairs of rocking members mounted on the carriage, the two members ofeach pair exerting pressure on one frame only at points adjacentopposite ends of the frame and intermediate the tandem feed-rolls insaid frame. and a pair of springs each of which is connected to one pairof said members to cause each pair of members to exert a uniformpressure on the frame engaged thereby.

8. In a typewriting machine. the combination of a platen carriage, aplaten on the carriage. a feed-roll frame on the carriage. means forforcing the frame away from the platen. a pair of members pivotallymounted on the carriage to swing about axes extends ing transversely ofthe carriage and engaging the frame adjacent opposite ends of the frame.each of said members being provided with an actuating arm, and a springconnecting said actuating arms to cause the members to exert a uniformpressure at different points on the feed-roll frame.

9. In a paper feed mechanism. the combination of a platen. a pluralityof sets of tandem feed-rolls. a plurality of pairs of pivotallylll)])()llttl pressure-distributing memhers. each of said pairs ofmembers cooperating with a different set of tandem feed-rolls to pressthe same toward the platen. and a plurality of springs each of which isconnected with a different pair of pressure-dis- .tributing members toswing the two members connected therewith in opposite directions abouttheir pivots toward the platen.

1 In a t \pe\v1'iting machine. the combination of a platen carriage. a)laten on the carriage. apair of tandem feed-rolls. means for rotatabl vsupporting the rolls in spaced relation. a pair of pressurememberspivotall v mounted on the carriage and connected with theroll-supporting means at different points to permit independent orsimulta- Htuti movement of the rolls awa v from the platen and endwisetilting of the rolls relatively to the platen, and cast-off means forswinging'first one and then the other of said rolls away from the platenagainst action of said pressure members. a

11. In a paper feed mechanism, the combination of a platen, a floatingfeed-roll frame. tandem feed-rolls in the frame, a pair of pivotallysupported members on which said frame is mounted to tilt at either endor either longitudinal edge away from the platen, and a spring connectedwith both of .said members to normally rock said members members ateither of a plurality of points to vary the pull of the spring thereon.-

13. In a paper feed mechanism. the comblnation of a pair of pivotallysupported members. a coil spring (onnected at its ends withsaid membersto normalllv swing the members in opposite directions about theirpivots, and a feed-roll frame having tandem feed rolls thereon andloosely supported directly on said members intermediate the tandemfeed-rolls at points spaced apart longitudinally of the rolls.

14. In a paper feed mechanism. the combination of a platen. a feed-rollframe. tandem feed rolls on the frame, and a pair of spring-urgedpivotally supported members on which said frame is mounted at spa-redaligned points to move away from the platen against the pressure ofeither or both members and to rock on said members about an axisextending transversely of the pivotal axes'of said members through thepoints" of connection of the members with the frame.

15. In a paper feed mechanism. the combination of a pair of tandemfeed-roll shafts. feed rolls on said shafts, a platen, a pair ofpressure members each pivotally mounted to swing about an axis extendingtransversely of the platen. means connected with both shafts at pointsspaced apart longitudinally of the shafts and supportedon said membersto rock about an axis extending longitudinallv of the shafts andintermediate said shafts. and spring means for normally rocking saidmembers in opposite directions about. their pivots towardthe platen.

16. In a paper feed mechanism. the combination of a platen. a pluralityof feed-roll frames. tandem feed-rolls in each frame. a plurality ofsprings. and means interpo ed between each spring and a difierent one ofsaid frames for independently yieldahlv pressing opposite ends of itsassociated frame toward the. platen. each of said f 'ames being liltablymounted on its associated spring pressed means to rock thereon about anaxis extending longitudinally of the frame substantially midway betweenthe tandem feed-rolls.

17. In a. paper feed mechanism, the-combination of a platen, a pluralityof feed- 7 roll frames, feed-rolls in said frames, a plutwo membersconnected therewith in opposite directions about their pivots toward theplaten.

18. In a-paper feed mechanism, the combination of a platen, a pluralityof feed-roll frames, feed-rolls in the frames, a plurality of. pairs ofoppositely swinging members,-

each of said pairs of members loosely engaging a different frameadjacent opposite ends springs normally swin ing the two membersconnected therewit in opposite directions about their pivots toward theplaten, and cast-off means for simultaneously forcing the frames awayfrom the platen having direct lost-motion connections with the framespermitting the frames to yield relatively to the platen independently ofmovement of the cast-off means.

19. In a paper-feed mechanism, the combination of a platen, a pluralityof pairs of swinging members, a plurality of springs each normallyurging one pair of said members toward the platen, a plurality of feedroll frames each resting loosely on one pair of said swinging membersadjacent opposite ends of the frame, a. set of tandem feedrolls in eachframe, and rockable means connected with all of said frames for firsttilting the frames on said swinging members about the axes of theforward feed rolls and then swinging the frames bodily. about the axisof oscillation of said rockable means. of the frame, independent springsoonnec-t ing the pairs of members, each of said This specificationsigned this sixth day of November, A. D. 1918.

FRANK H. ARMSTRONG.

